Salesforce Certified JavaScript Developer I Practice Test - Questions Answers, Page 22

Refer to the code below

let inArray = [[1,2],[3,4,5]];

which two statements results in the array [1,2,3,4,5]?

choose 2 answer

A developer has two ways to write a function:

Option A:

function Monster(){

this.growl = ()=>{

console.log('Grr!');

}}

Option B:

function Monster(){};

Monster.prototype.growl = ()=>{

console.log('Grr!');

}

After deciding on an option, the developer creates 1000 monster objects.

How many growl methods are created with Option A and Option B?

Refer to the following code:

class Vehicle{

constructor(plate){

this.plate = plate;

}}

class Truck extends Vehicle{

constructor(plate, weight){

//Missing code

this.weight = weight;

}

displayWeight(){

console.log(`The truck ${this.plate} has a weight of ${this.weight}lb.`);

}}

let myTruck = new Truck('123Ab',5000);

myTruck.displayWeight();

Which statement should be added to missing code for the code to display 'The truck 123AB has a weight of 5000lb.

Refer to the code below:

const car = {

price:100,

getPrice:function(){

return this.price;

}}

;

const customCar = Object.create(car);

customCar.price = 70;

delete customCar.price;const result = customCar.getPrice();

What is the value of result after the code executes?

Refer to the code below:

What is the result when the Promise in the execute function is rejected?

Given the JavaScript below:

Which code should replace the placeholder comment on line 06 to hide accounts that do not match the search string?

A developer tries to retrieve all cookies, then sets a certain key value pair in the cookie. These statements are used:

What is the behavior?

Given the following code:

What is the output of line 02?

A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.

To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.

Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?